Cycloidal pin gear planetary drive device with improved torque density, and machine equipment

By designing a cycloidal pinwheel planetary transmission device, the shortcomings of harmonic reducers and RV cycloidal reducers in the field of high-precision and high-torque-density transmission are solved, and the high torque density, fatigue strength and impact resistance are improved. It is easy to miniaturize and is suitable for humanoid robots, precision machine tools and aerospace equipment.

WO2026124402A1 Publication Date: 2026-06-18ZHOU XIAOTING
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
ZHOU XIAOTING
Filing Date
2025-12-08
Publication Date
2026-06-18

AI Technical Summary

⚠Technical Problem

Existing harmonic reducers suffer from low fatigue strength and stiffness, short lifespan, and poor impact resistance in high-precision and high-torque-density transmission fields. RV cycloidal reducers are not easy to miniaturize and their torque density and bidirectionality are inferior to those of harmonic reducers, which limits their application in aerospace, humanoid robots, and other fields.

⚗Method used

A cycloidal pinwheel planetary transmission device is adopted, which forms a stable output mechanism through the first support plate, the second support plate and the intermediate support plate. The structure of four cycloidal wheels is used to achieve dynamic balance. Smaller bearings and force transmission columns are used to reduce volume and mass, and improve torque density, fatigue strength and structural rigidity.

🎯Benefits of technology

It improves the torque density, fatigue strength, structural rigidity and impact resistance of the transmission device, facilitates miniaturization, extends service life, and improves transmission stability and efficiency.

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Abstract

The present disclosure relates to a cycloidal pin gear planetary drive device with improved torque density, and machine equipment. The cycloidal pin gear planetary drive device comprises a housing, roller pins, a first bearing, a second bearing, a first support disk, a second support disk, an intermediate support disk, an input shaft, a cycloidal gear and force transmission columns, wherein the first support disk comprises a first disk body and first bosses, the first disk body having first support holes and a first central hole; the second support disk comprises a second disk body and second bosses, the second disk body having second support holes and a second central hole; the intermediate support disk has third support holes, and the first bosses and the second bosses abut against the intermediate support disk; and two ends of the force transmission columns are respectively supported in the first support holes and the second support holes, and the parts of the force transmission columns between the two ends thereof are supported in the third support holes, such that the first support disk, the second support disk and the intermediate support disk jointly provide support for the force transmission columns. The torque density of the cycloidal pin gear planetary drive device provided in the present disclosure can be improved, thereby achieving the miniaturization of the drive device.
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